Full HTML_HTML/Xhtml_webpage production of upload form with image preview function

Upload form with image preview function, the complete HTML code is as follows

<script> <br />function viewmypic(mypic,imgfile) { <br />if (imgfile.value){ <br />mypic.src=imgfile.value; <br />mypic.style.display=""; <br />mypic.border=1; <br />} <br />} <br /></script>